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horsena [70]
2 years ago
6

Here is a picture that shows one side of a child's wooden block with a semicircle cut out at the bottom.

Mathematics
1 answer:
soldi70 [24.7K]2 years ago
4 0
30.7 cm² (nearest tenth)
Step-by-step explanation:
Area of the wooden block = area of rectangle - area of semi-circle
Area of Rectangle = length × width
Length = 9 cm
Width = 4.5 cm
Area of rectangle = 40.5 cm²
Area of semi-circle = ½(πr²)
Radius (r) = ½ of diameter = ½*5 = 2.5 cm
π = 3.14
Area of semi-circle = ½(3.14*2.5²)
Area of semi-circle = 9.8125 cm²
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